2 rest.cc -- implement Rest
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "output-def.hh"
11 #include "font-interface.hh"
14 #include "paper-score.hh"
15 #include "staff-symbol-referencer.hh"
16 #include "directional-element-interface.hh"
19 MAKE_SCHEME_CALLBACK (Rest,after_line_breaking,1);
21 Rest::after_line_breaking (SCM smob)
23 Grob *me = unsmob_grob (smob);
24 int bt = ly_scm2int (me->get_property ("duration-log"));
25 int lc = Staff_symbol_referencer::line_count (me);
26 Real ss = Staff_symbol_referencer::staff_space (me);
29 if (bt == 0 && lc > 1)
31 me->translate_axis (ss , Y_AXIS);
36 me->translate_axis (ss/2 , Y_AXIS);
39 Grob * d = unsmob_grob (me->get_property ("dot"));
40 if (d && bt > 4) // UGH.
42 d->set_property ("staff-position",
43 scm_int2num ((bt == 7) ? 4 : 3));
45 if (d && bt >= -1 && bt <= 1) // UGH again.
47 d->set_property ("staff-position",
48 scm_int2num ((bt == 0) ? -1 : 1));
50 return SCM_UNSPECIFIED;
54 make this function easily usable in C++
57 Rest::glyph_name (Grob *me, int balltype, String style, bool try_ledgers)
59 bool ledgered_b = false;
60 if (try_ledgers && (balltype == 0 || balltype == 1))
62 Real rad = Staff_symbol_referencer::staff_radius (me) * 2.0;
63 Real pos = Staff_symbol_referencer::get_position (me);
66 Figure out when the rest is far enough outside the staff. This
67 could bemore generic, but hey, we understand this even after
70 ledgered_b |= (balltype == 0) && (pos >= +rad + 2 || pos < -rad);
71 ledgered_b |= (balltype == 1) && (pos <= -rad - 2 || pos > +rad);
74 String actual_style (style.to_str0 ());
76 if ((style == "mensural") || (style == "neo_mensural")) {
79 FIXME: Currently, ancient font does not provide ledgered rests;
80 hence the "o" suffix in the glyph name is bogus. But do we need
81 ledgered rests at all now that we can draw ledger lines with
82 variable width, length and blotdiameter? -- jr
87 There are no 32th/64th/128th mensural/neo_mensural rests. In
88 these cases, revert back to default style.
94 if ((style == "classical") && (balltype != 2)) {
96 classical style: revert back to default style for any rest other
102 if (style == "default") {
104 Some parts of lily still prefer style "default" over "".
105 Correct this here. -- jr
110 return ("rests-") + to_string (balltype) + (ledgered_b ? "o" : "") + actual_style;
114 MAKE_SCHEME_CALLBACK (Rest,print,1);
117 Rest::brew_internal_stencil (SCM smob, bool ledgered)
119 Grob* me = unsmob_grob (smob);
121 SCM balltype_scm = me->get_property ("duration-log");
122 if (!ly_c_number_p (balltype_scm))
123 return Stencil ().smobbed_copy ();
125 int balltype = ly_scm2int (balltype_scm);
128 SCM style_scm = me->get_property ("style");
129 if (ly_c_symbol_p (style_scm))
130 style = ly_scm2string (scm_symbol_to_string (style_scm));
132 Font_metric *fm = Font_interface::get_default_font (me);
133 String font_char = glyph_name (me, balltype, style, ledgered);
134 Stencil out = fm->find_by_name (font_char);
136 me->warning (_f ("rest `%s' not found", font_char.to_str0 ()));
138 return out.smobbed_copy ();
142 Rest::print (SCM smob)
144 return brew_internal_stencil (smob, true);
146 MAKE_SCHEME_CALLBACK (Rest,extent_callback,2);
148 We need the callback. The real stencil has ledgers depending on
149 Y-position. The Y-position is known only after line breaking. */
151 Rest::extent_callback (SCM smob, SCM ax)
153 Axis a = (Axis) ly_scm2int (ax);
156 Don't want ledgers: ledgers depend on Y position, which depends on
157 rest collision, which depends on stem size which depends on beam
158 slop of opposite note column.
160 consequence: we get too small extents and potential collisions
163 SCM m = brew_internal_stencil (smob, a != X_AXIS);
164 return ly_interval2scm (unsmob_stencil (m)->extent (a));
167 MAKE_SCHEME_CALLBACK (Rest,polyphonic_offset_callback,2);
169 Rest::polyphonic_offset_callback (SCM smob, SCM)
171 Grob* me = unsmob_grob (smob);
172 if (ly_c_number_p (me->get_property ("staff-position")))
173 return scm_make_real (0);
175 Direction d = get_grob_direction (me);
178 off *= Staff_symbol_referencer::staff_space (me);
179 return scm_make_real (off);
182 ADD_INTERFACE (Rest,"rest-interface",
184 "style direction minimum-distance");